Nock \Nock\, n. [See Notch.]1. A notch.
He took his arrow by the nock. --Chapman.
2. (Naut.) The upper fore corner of a boom sail or of a trysail.
Source: Webster's Revised Unabridged Dictionary (1913)
Nock \Nock\, v. t. To notch; to fit to the string, as an arrow; to string, as a bow. --Chapman.